Home / 1,919.43-2,879.32-1,187.47

Finding the Fourth Proportional to 1,919.43, 2,879.32 and 1,187.47

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Solution

The fourth proportional to 1,919.43, 2,879.32 and 1,187.47 is: 1,781.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.43 : 2,879.32 = 1,187.47 : x
  2. Step 2: Convert to fraction form
    1,919.43/2,879.32 = 1,187.47/x
  3. Step 3: Cross multiply
    1,919.43x = 2,879.32 × 1,187.47
  4. Step 4: Simplify right side
    1,919.43x = 3,419,116.37
  5. Step 5: Solve for x
    x = 3,419,116.37/1,919.43
  6. Step 6: Final answer
    x = 1,781.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.